Glasnow, ranked No. 20on MLBPipeline.com's Top 100 Prospects list, struck out five batters and held the Manatees to two hits and four walks. He threw 97 pitches to complete his eighth scoreless outing in 18 starts this season.

Though Glasnow began the game with four hitless innings, his wildness meant he had just one 1-2-3 inning -- the first. But he had no trouble working around the baserunners, getting ground balls or strikeouts when he needed them.

With the victory, Glasnow improved to 8-5 with a 1.63 ERA. He has struck out 111 batters and walked 49 in 94 innings this season. He ranks second in the Florida State League in ERA and strikeouts, despite missing most of April due to a back injury he suffered in Spring Training.

Glasnow led all Pirates Minor Leaguers with 164 strikeouts in 2013 and is once again atop the organization's leaderboard this season. Right-hander Nick Kingham, the club's No. 5 prospect, ranks second with 96 strikeouts.